Blow-pipe



(No Model.) I

' T. T. MORRELL I .BLoWPIPl-z.v i w N0.260,77.8. PatentdJulyu, 18-182.

UNITED STATES' a PATENT OFFICE.

THOMAS T. MORRELL, oF JoHNsToWNV, PENNsYLyANIA.

SPECIFICATION formng part of Letters Patent No. 260,773, dated July 11,18.82.

' Application filed March 30, 1882. (No model.)

To all 'whom it may concern: f'

Be it known that I, TnoMAs- T. MoRnELL, of Johnstown, in the countyofUambria and State of Pennsylvania, have inveiited certain Improvementsin Blow-Pipes, of which the following is a specification.

My invention relates to and is an improvement upon the blow-pipe forwhich Letters Patent of the United States No. 243,597 were issued to methe 28th day of June, A. D. 1881.

The object of my invention is to combine with my blow-pipe apparatus forproducing a less intense and easiIy-regulated fiame to be employed inthe earlier stages of chemical operations and before the fan-blast isused. It.

is well known that in the initial stages of chemical Operations it isdesirable to use aless degree of heat, to be increased as the operationprogresses, and by means of my im'proved appliances this is readilyaccomplished.

In the drawings accompanyin' g this application, Figure 1 is a side viewof my patented blow-pipe provided with my improvement on the same. Fig.2 is an edge elevation of the same. Fig. 3 is a section of thefan-chamber and valve-chamber of said blow-pipe.

The principal parts of said blow-pipe, as shown in said drawiugs,consist of fan A, fanchamber B, valve-chamber O, inlet-'pipe D,Outlet-pipe F, and nozzle G, which, together with other parts, aredescribed more fully in my said patent of June 28, A. D. 1881.

My invention consists in providing said blow-pipe with an independentgas-supply by means of the appa-ratus following: a

a is a small metallic gas-pipe, taking gas by `means of a flexible tube,orotherwise, at its end b. It enters the outlet-pipeF of the fan-chamberB at c, and extends into this Outlet-pipe a short distance, as shown inFig. 1, having at its end d, which is closed, one or more smallperforations for the escape of gas into the outlet-pipe F. For thepurpose of supplying airc the Outlet-pipe F is provided with theregister f, placed at a point near the end d of the gaspipe a, and soconstructed that it may be closed, or more or less opened, at pleasure,and when closed will be gas-tight. In the initial or other stage of theoperation, when a comparatively low degree of heat is required, thisindependent gas-pipe a will be used without the fan-blast. w VVhen ahigher degree of heat is required the gas will be turned off fromgaspipe a, the register f will be closed, and the fan-blast willbe-used;

Havin g thus described my invention, what I claim, and desire to secure.by Letters Patent, 1s-- The gas-pipe a and register f, in combinationWith-the blow-pipe, substantially as (lescribed, and for the purposesset forth.

THOMAS T; MORRELL.

